CN204332835U - A kind of relay drive circuit with antijamming capability - Google Patents
A kind of relay drive circuit with antijamming capability Download PDFInfo
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- CN204332835U CN204332835U CN201420802187.2U CN201420802187U CN204332835U CN 204332835 U CN204332835 U CN 204332835U CN 201420802187 U CN201420802187 U CN 201420802187U CN 204332835 U CN204332835 U CN 204332835U
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Abstract
A kind of relay drive circuit with antijamming capability.It comprises two resistor R1-R2, diode D1, two triodes Q1, Q2 and relay U1; The relay drive circuit that the utility model provides has following technique effect: 1, the utility model device used is less, and has higher antijamming capability, improves the reliability of whole system.2, peripheral components of the present utility model is made up of resistance, diode and triode, and complexity is lower, improves the machinability of product.3, drive circuit of the present utility model effectively can suppress the inverse overvoltage in short-term of relay shutdown moment.
Description
Technical field
The utility model belongs to electric equipment Driving technique field, particularly relates to a kind of relay drive circuit with antijamming capability.
Background technology
In a power distribution system, a large amount of load equipments needs to be driven by relay, and this kind of load often has stronger EMI (electromagnetic interference) characteristic.Because electromagnetic interference can carry out the transmission of energy by radiation and conduction, so, once the energy of transmission causes the level reversion controlling pin, easily cause the misoperation of relay.
In sum, the antijamming capability improving relay drive circuit is needed.At present, most relay drive circuits can only meet basic driving function, but can not ensure the reliably working of circuit under strong interference environment, can not ideally solve the problem.
Summary of the invention
In order to solve the problem, the purpose of this utility model is to provide a kind of relay drive circuit with antijamming capability.
In order to achieve the above object, the relay drive circuit with antijamming capability that the utility model provides comprises: two resistor R1-R2, diode D1, two triodes Q1, Q2 and relay U1; Wherein:
A point and F point are two control points of external control component, and A point is connected with the base stage of the first triode Q1 by the first resistor R1; The emitter of the first triode Q1 is connected with+5V power supply; The collector electrode of the first triode Q1 is connected with the port one of the control coil of the negative electrode of diode D1, relay U1; The anode of diode D1 is connected with the collector electrode of port 2, the second triode Q2 of the control coil of relay U1; F point is connected with the base stage of the second triode Q2 by the second resistor R2; The emitter of the second triode Q2 is connected with reference horizontal plane of manufacturing 0.
The first described resistor R1, the second resistor R2 are 5.1k ohmic resistor; First triode Q1 is PNP type triode, and its concrete model is the 8550, second triode Q2 is NPN type triode, and its concrete model is 8050; Diode D1 is switching diode, and its concrete model is D1N4148; The control voltage of the control coil of relay U1 is+5V.
The relay drive circuit of what the utility model provided have antijamming capability has two and controls mouths, just can drive circuit in time meeting certain condition.Compared with other modes, this circuit can not take the mcu resource in a large amount of peripheral control units, can improve the reliability of system.
The relay drive circuit that the utility model provides has following technique effect:
1, the utility model device used is less, and has higher antijamming capability, improves the reliability of whole system.
2, peripheral components of the present utility model is made up of resistance, diode and triode, and complexity is lower, improves the machinability of product.
3, drive circuit of the present utility model effectively can suppress the inverse overvoltage in short-term of relay shutdown moment.
Accompanying drawing explanation
The schematic diagram with the relay drive circuit of antijamming capability that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the relay drive circuit with antijamming capability that the utility model provides is described in detail.
As shown in Figure 1, the relay drive circuit with antijamming capability that the utility model provides comprises: two resistor R1-R2, diode D1, two triodes Q1, Q2 and relay U1; Wherein:
A point and F point are two control points of external control component, and A point is connected with the base stage of the first triode Q1 by the first resistor R1; The emitter of the first triode Q1 is connected with+5V power supply; The collector electrode of the first triode Q1 is connected with the port one of the control coil of the negative electrode of diode D1, relay U1; The anode of diode D1 is connected with the collector electrode of port 2, the second triode Q2 of the control coil of relay U1; F point is connected with the base stage of the second triode Q2 by the second resistor R2; The emitter of the second triode Q2 is connected with reference horizontal plane of manufacturing 0.
The first described resistor R1, the second resistor R2 are 5.1k ohmic resistor; First triode Q1 is PNP type triode, and its concrete model is the 8550, second triode Q2 is NPN type triode, and its concrete model is 8050; Diode D1 is switching diode, and its concrete model is D1N4148; The control voltage of the control coil of relay U1 is+5V; The driving voltage of the driving pin of the MCU involved by the utility model is+5V.
The operation principle of the relay drive circuit that the utility model provides is as follows:
A point and F point are two control points of external control component, and when MCU driving A point, F point are low level time, because A point is low level, so the collector and emitter conducting of the first triode Q1 of PNP character, the first triode Q1 is in saturation region.Because F point is low level, so the collector and emitter cut-off of the second triode Q2 of NPN character, the second triode Q2 works in cut-off region.So electric current cannot flow to H point from C point, the control coil of relay U1 is caused to work.
When external control component driving A point, F point are high level time, because A point is high level, so the collector and emitter cut-off of the first triode Q1 of PNP character, the first triode Q1 works in cut-off region.Because F point is high level, so the collector and emitter conducting of the second triode Q2 of NPN character, the first triode Q1 works in saturation region, so electric current cannot flow to H point from C point, causes the control coil of relay U1 to work.
In sum, only have when A point is in low level, time F point is in high level, first triode Q1, the second triode Q2 can be in conducting state simultaneously, be operated in saturation region, now electric current can flow to H point from C point by the control coil of relay U1, and relay U1 can normally work.
When external control component is in the environment of strong electromagnetic, likely the level of drived control point pin A point, F point produces saltus step, and learnt by above-mentioned situation, only have when A point is in low level, time F point is in high level, relay can be driven.Compare other relay type of drive, this disturbed probability is obviously much lower.
The single-ended drive relay Scheme that the relay drive circuit of what the utility model provided have antijamming capability is different from the past, this hardware solution can utilize less electronic device, make product obtain the lifting of stronger interference free performance, realize the optimization of design.
Claims (2)
1. there is a relay drive circuit for antijamming capability, it is characterized in that: the described relay drive circuit with antijamming capability comprises: two resistor R1-R2, diode D1, two triodes Q1, Q2 and relay U1; Wherein:
A point and F point are two control points of external control component, and A point is connected with the base stage of the first triode Q1 by the first resistor R1; The emitter of the first triode Q1 is connected with+5V power supply; The collector electrode of the first triode Q1 is connected with the port one of the control coil of the negative electrode of diode D1, relay U1; The anode of diode D1 is connected with the collector electrode of port 2, the second triode Q2 of the control coil of relay U1; F point is connected with the base stage of the second triode Q2 by the second resistor R2; The emitter of the second triode Q2 is connected with reference horizontal plane of manufacturing 0.
2. the relay drive circuit with antijamming capability according to claim 1, is characterized in that: the first described resistor R1, the second resistor R2 are 5.1k ohmic resistor; First triode Q1 is PNP type triode, and its concrete model is the 8550, second triode Q2 is NPN type triode, and its concrete model is 8050; Diode D1 is switching diode, and its concrete model is D1N4148; The control voltage of the control coil of relay U1 is+5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420802187.2U CN204332835U (en) | 2014-12-17 | 2014-12-17 | A kind of relay drive circuit with antijamming capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420802187.2U CN204332835U (en) | 2014-12-17 | 2014-12-17 | A kind of relay drive circuit with antijamming capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204332835U true CN204332835U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420802187.2U Active CN204332835U (en) | 2014-12-17 | 2014-12-17 | A kind of relay drive circuit with antijamming capability |
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| Country | Link |
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| CN (1) | CN204332835U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469628A (en) * | 2015-08-17 | 2017-03-01 | 佛山市顺德区美的电热电器制造有限公司 | For the protection control method of relay, device |
| US11251699B2 (en) | 2018-06-15 | 2022-02-15 | Samsung Sdi Co., Ltd. | Relay and battery system including the same |
-
2014
- 2014-12-17 CN CN201420802187.2U patent/CN204332835U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469628A (en) * | 2015-08-17 | 2017-03-01 | 佛山市顺德区美的电热电器制造有限公司 | For the protection control method of relay, device |
| CN106469628B (en) * | 2015-08-17 | 2019-05-31 | 佛山市顺德区美的电热电器制造有限公司 | For the protection control method of relay, device |
| US11251699B2 (en) | 2018-06-15 | 2022-02-15 | Samsung Sdi Co., Ltd. | Relay and battery system including the same |
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